DO!

HELP OUT
Why not walk her dog, as Benji Madden does for Paris Hilton? "It's an honor," says Mystery, "to make life a little more comfortable for her."

DON'T

GET A TATTOO IN HER HONOR
"Ridiculous!" says Mystery. To wit: Dave Navarro is still branded like a steer with ex-wife Carmen Elektra's initials.

DO!

BOND WITH HER CHILDREN
"Hang out with them. Be sincere." Getting to know her son has brought Jim Carrey closer to Jenny McCarthy.

DON'T

BLOG ABOUT YOUR EX
"Know that she may read it 30 years later." (Or sooner.) Just ask John Mayer. (Or rumored target Jessica Simpson.)

DO!

KEEP HER CLOSE AT EVENTS
"Show the world this is who you decided to go with." With Chelsy Davy, Prince Harry shows off royal form.

DON'T

MAKE A SEX TAPE PUBLIC
"We all have sex tapes. Question is, Do you want us to have your sex tape? No. Encrypt!" Too late for Ray-J and Kim!